Even in a time where everything from our phones to our watches could easily serve up a classic game of Space Invaders, there's still something appealing about this miniature keychain version. It actually plays more like a cross between Space Invaders and Whac-A-Mole, but instead of bludgeoning rodents you're taking out blinking alien invaders that are coming for everyone and everything you hold dear.

Maybe it's being able to pound away on physical buttons instead of a smooth touchscreen, or maybe it's the fact we can play this version of Space Invaders without being interrupted by calls or emails. Whatever the reason, we're happy to drop $13 on one of our favorite games of all time. [ThinkGeek]